Errno Error Codes#

Errno Error Codes contains the defines for the errno error codes.

Macros#

#define
EPERM 1

Not owner.

#define
ENOENT 2

No such file or directory.

#define
ESRCH 3

No such process.

#define
EINTR 4

Interrupted system call.

#define
EIO 5

I/O error.

#define
ENXIO 6

No such device or address.

#define
E2BIG 7

Arguments list too long.

#define
ENOEXEC 8

Exec format error.

#define
EBADF 9

Bad file number.

#define
ECHILD 10

No children.

#define
EAGAIN 11

No more processes.

#define
ENOMEM 12

Not enough space.

#define
EACCES 13

Permission denied.

#define
EFAULT 14

Bad address.

#define
ENOTBLK 15

Block device required.

#define
EBUSY 16

Device or resource busy.

#define
EEXIST 17

File exists.

#define
EXDEV 18

Cross-device link.

#define
ENODEV 19

No such device.

#define
ENOTDIR 20

Not a directory.

#define
EISDIR 21

Is a directory.

#define
EINVAL 22

Invalid argument.

#define
ENFILE 23

Too many open files in system.

#define
EMFILE 24

File descriptor value too large.

#define
ENOTTY 25

Not a character device.

#define
ETXTBSY 26

Text file busy.

#define
EFBIG 27

File too large.

#define
ENOSPC 28

No space left on device.

#define
ESPIPE 29

Illegal seek.

#define
EROFS 30

Read-only file system.

#define
EMLINK 31

Too many links.

#define
EPIPE 32

Broken pipe.

#define
EDOM 33

Mathematics argument out of domain of function.

#define
ERANGE 34

Result too large.

#define
ENOMSG 35

No message of desired type.

#define
EIDRM 36

Identifier removed.

#define
EDEADLK 45

Deadlock.

#define
ENOLCK 46

No lock.

#define
ENOSTR 60

Not a stream.

#define
ENODATA 61

No data (for no delay io)

#define
ETIME 62

Stream ioctl timeout.

#define
ENOSR 63

No stream resources.

#define
ENOLINK 67

Virtual circuit is gone.

#define
EPROTO 71

Protocol error.

#define
EMULTIHOP 74

Multihop attempted.

#define
EBADMSG 77

Bad message.

#define
EFTYPE 79

Inappropriate file type or format.

#define
ENOSYS 88

Function not implemented.

#define
ENOTEMPTY 90

Directory not empty.

#define
ENAMETOOLONG 91

File or path name too long.

#define
ELOOP 92

Too many symbolic links.

#define
EOPNOTSUPP 95

Operation not supported on socket.

#define
EPFNOSUPPORT 96

Protocol family not supported.

#define
ECONNRESET 104

Connection reset by peer.

#define
ENOBUFS 105

No buffer space available.

#define
EAFNOSUPPORT 106

Address family not supported by protocol family.

#define
EPROTOTYPE 107

Protocol wrong type for socket.

#define
ENOTSOCK 108

Socket operation on non-socket.

#define
ENOPROTOOPT 109

Protocol not available.

#define
ESHUTDOWN 110

Can't send after socket shutdown.

#define
ECONNREFUSED 111

Connection refused.

#define
EADDRINUSE 112

Address already in use.

#define
ECONNABORTED 113

Software caused connection abort.

#define
ENETUNREACH 114

Network is unreachable.

#define
ENETDOWN 115

Network interface is not configured.

#define
ETIMEDOUT 116

Connection timed out.

#define
EHOSTDOWN 117

Host is down.

#define
EHOSTUNREACH 118

Host is unreachable.

#define
EINPROGRESS 119

Connection already in progress.

#define
EALREADY 120

Socket already connected.

#define
EDESTADDRREQ 121

Destination address required.

#define
EMSGSIZE 122

Message too long.

#define
EPROTONOSUPPORT 123

Unknown protocol.

#define
ESOCKTNOSUPPORT 124

Socket type not supported.

#define
EADDRNOTAVAIL 125

Address not available.

#define
ENETRESET 126

Connection aborted by network.

#define
EISCONN 127

Socket is already connected.

#define
ENOTCONN 128

Socket is not connected.

#define
ETOOMANYREFS 129

Too many references: can't splice.

#define
ENOTSUP 134

Not supported.

#define
EILSEQ 138

Illegal byte sequence.

#define
EOVERFLOW 139

Value too large for defined data type.

#define
ECANCELED 140

Operation canceled.

#define
ENOTRECOVERABLE 141

State not recoverable.

#define
EOWNERDEAD 142

Previous owner died.

#define
EWOULDBLOCK EAGAIN

Operation would block.

Macro Definition Documentation#

EPERM#

#define EPERM
Value:
1

Not owner.


ENOENT#

#define ENOENT
Value:
2

No such file or directory.


ESRCH#

#define ESRCH
Value:
3

No such process.


EINTR#

#define EINTR
Value:
4

Interrupted system call.


EIO#

#define EIO
Value:
5

I/O error.


ENXIO#

#define ENXIO
Value:
6

No such device or address.


E2BIG#

#define E2BIG
Value:
7

Arguments list too long.


ENOEXEC#

#define ENOEXEC
Value:
8

Exec format error.


EBADF#

#define EBADF
Value:
9

Bad file number.


ECHILD#

#define ECHILD
Value:
10

No children.


EAGAIN#

#define EAGAIN
Value:
11

No more processes.


ENOMEM#

#define ENOMEM
Value:
12

Not enough space.


EACCES#

#define EACCES
Value:
13

Permission denied.


EFAULT#

#define EFAULT
Value:
14

Bad address.


ENOTBLK#

#define ENOTBLK
Value:
15

Block device required.


EBUSY#

#define EBUSY
Value:
16

Device or resource busy.


EEXIST#

#define EEXIST
Value:
17

File exists.


EXDEV#

#define EXDEV
Value:
18

Cross-device link.


ENODEV#

#define ENODEV
Value:
19

No such device.


ENOTDIR#

#define ENOTDIR
Value:
20

Not a directory.


EISDIR#

#define EISDIR
Value:
21

Is a directory.


EINVAL#

#define EINVAL
Value:
22

Invalid argument.


ENFILE#

#define ENFILE
Value:
23

Too many open files in system.


EMFILE#

#define EMFILE
Value:
24

File descriptor value too large.


ENOTTY#

#define ENOTTY
Value:
25

Not a character device.


ETXTBSY#

#define ETXTBSY
Value:
26

Text file busy.


EFBIG#

#define EFBIG
Value:
27

File too large.


ENOSPC#

#define ENOSPC
Value:
28

No space left on device.


ESPIPE#

#define ESPIPE
Value:
29

Illegal seek.


EROFS#

#define EROFS
Value:
30

Read-only file system.


EMLINK#

#define EMLINK
Value:
31

Too many links.


EPIPE#

#define EPIPE
Value:
32

Broken pipe.


EDOM#

#define EDOM
Value:
33

Mathematics argument out of domain of function.


ERANGE#

#define ERANGE
Value:
34

Result too large.


ENOMSG#

#define ENOMSG
Value:
35

No message of desired type.


EIDRM#

#define EIDRM
Value:
36

Identifier removed.


EDEADLK#

#define EDEADLK
Value:
45

Deadlock.


ENOLCK#

#define ENOLCK
Value:
46

No lock.


ENOSTR#

#define ENOSTR
Value:
60

Not a stream.


ENODATA#

#define ENODATA
Value:
61

No data (for no delay io)


ETIME#

#define ETIME
Value:
62

Stream ioctl timeout.


ENOSR#

#define ENOSR
Value:
63

No stream resources.


ENOLINK#

#define ENOLINK
Value:
67

Virtual circuit is gone.


EPROTO#

#define EPROTO
Value:
71

Protocol error.


EMULTIHOP#

#define EMULTIHOP
Value:
74

Multihop attempted.


EBADMSG#

#define EBADMSG
Value:
77

Bad message.


EFTYPE#

#define EFTYPE
Value:
79

Inappropriate file type or format.


ENOSYS#

#define ENOSYS
Value:
88

Function not implemented.


ENOTEMPTY#

#define ENOTEMPTY
Value:
90

Directory not empty.


ENAMETOOLONG#

#define ENAMETOOLONG
Value:
91

File or path name too long.


ELOOP#

#define ELOOP
Value:
92

Too many symbolic links.


EOPNOTSUPP#

#define EOPNOTSUPP
Value:
95

Operation not supported on socket.


EPFNOSUPPORT#

#define EPFNOSUPPORT
Value:
96

Protocol family not supported.


ECONNRESET#

#define ECONNRESET
Value:
104

Connection reset by peer.


ENOBUFS#

#define ENOBUFS
Value:
105

No buffer space available.


EAFNOSUPPORT#

#define EAFNOSUPPORT
Value:
106

Address family not supported by protocol family.


EPROTOTYPE#

#define EPROTOTYPE
Value:
107

Protocol wrong type for socket.


ENOTSOCK#

#define ENOTSOCK
Value:
108

Socket operation on non-socket.


ENOPROTOOPT#

#define ENOPROTOOPT
Value:
109

Protocol not available.


ESHUTDOWN#

#define ESHUTDOWN
Value:
110

Can't send after socket shutdown.


ECONNREFUSED#

#define ECONNREFUSED
Value:
111

Connection refused.


EADDRINUSE#

#define EADDRINUSE
Value:
112

Address already in use.


ECONNABORTED#

#define ECONNABORTED
Value:
113

Software caused connection abort.


ENETUNREACH#

#define ENETUNREACH
Value:
114

Network is unreachable.


ENETDOWN#

#define ENETDOWN
Value:
115

Network interface is not configured.


ETIMEDOUT#

#define ETIMEDOUT
Value:
116

Connection timed out.


EHOSTDOWN#

#define EHOSTDOWN
Value:
117

Host is down.


EHOSTUNREACH#

#define EHOSTUNREACH
Value:
118

Host is unreachable.


EINPROGRESS#

#define EINPROGRESS
Value:
119

Connection already in progress.


EALREADY#

#define EALREADY
Value:
120

Socket already connected.


EDESTADDRREQ#

#define EDESTADDRREQ
Value:
121

Destination address required.


EMSGSIZE#

#define EMSGSIZE
Value:
122

Message too long.


EPROTONOSUPPORT#

#define EPROTONOSUPPORT
Value:
123

Unknown protocol.


ESOCKTNOSUPPORT#

#define ESOCKTNOSUPPORT
Value:
124

Socket type not supported.


EADDRNOTAVAIL#

#define EADDRNOTAVAIL
Value:
125

Address not available.


ENETRESET#

#define ENETRESET
Value:
126

Connection aborted by network.


EISCONN#

#define EISCONN
Value:
127

Socket is already connected.


ENOTCONN#

#define ENOTCONN
Value:
128

Socket is not connected.


ETOOMANYREFS#

#define ETOOMANYREFS
Value:
129

Too many references: can't splice.


ENOTSUP#

#define ENOTSUP
Value:
134

Not supported.


EILSEQ#

#define EILSEQ
Value:
138

Illegal byte sequence.


EOVERFLOW#

#define EOVERFLOW
Value:
139

Value too large for defined data type.


ECANCELED#

#define ECANCELED
Value:
140

Operation canceled.


ENOTRECOVERABLE#

#define ENOTRECOVERABLE
Value:
141

State not recoverable.


EOWNERDEAD#

#define EOWNERDEAD
Value:
142

Previous owner died.


EWOULDBLOCK#

#define EWOULDBLOCK
Value:
EAGAIN

Operation would block.